who knows what

One or more things described with no detail. Our junk drawer has old remotes, instruction manuals, and who knows what else in it. You're supposed to be doing your homework, but instead you're slacking off and doing who knows what!

who knows what

see under what have you.

Common Names:

Name	Pronounced	Usage
Emmeline	EM-ə-leen, EM-ə-lien	English (Archaic)
Lorraine	[ləu'rein]
Giovanna	jo-VAHN-nah	Italian
Myron	MIE-rən (English), muy-rawn (Ancient Greek)	English, Ancient Greek
RÉMy	re-MEE	French
Michaela	mi-khah-E-lah (German), mi-KAY-lə (English)	German, Swedish, English, Czech, Slovak